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苯胺气体检测管181 Aniline C6H5NH2，Measuring Range 1.25 to 2.5 ppm 2.5 to 30 ppm 30 to 60 ppm Number of Pump Strokes 5 3 2 Correction Factor 1/2 1 2 Sampling Time 3 minutes per pump stroke，苯胺气体检测管价格
详情介绍：
苯胺气体检测管181 Aniline C6H5NH2
Aniline No.181
Aniline No.181
C6H5NH2
| Performance |
MeasuringRange | 1.25 to 2.5ppm | 2.5 to 30 ppm | 30 to 60 ppm |
Number of PumpStrokes | 5 | 3 | 2 |
CorrectionFactor | 1/2 | 1 | 2 |
SamplingTime | 3 minutes per pumpstroke | ||
DetectingLimit | 0.25 ppm (n=5) | ||
ColorChange | Pale yellow → Palegreen | ||
ReactionPrinciple | C6H5NH2 + Cr6+ → Cr3+ | ||
| Coefficient ofVariation | 10% (for2.5 to 10 ppm), 5% (for 10 to 30 ppm) | ||
| ShelfLife | 3Years | ||
| Correctionsfor temperature & humidity | Unnecessary | ||
| Store the tubes at cool and darkplace. | |||
| Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Ammonia | 1/10 time | Plus error | No discoloration |
Amines | 1/10 time | Plus error | No discoloration |
Aromaticamines | - | Plus error | Produce pale greendiscoloraiton |
| Othersubstance measurable with this detector tube |
Substance | Correction | No. of pump strokes | Measuring range |
N-methylaniline | Factor:1.4 | 2 | 3.5 to 42 ppm |
N,N-Dimethylaniline | Factor:1.0 | 3 | 2.5 to 30 ppm |
o-Toluidine | Factor: 2.0 | 2 | 5 to 60ppm |
| Calibration gasgeneration | Diffusion tubemethod | |
| TLV-TWA | TLV-STEL | Explosive range |
| 2ppm | - | 1.3 to 11% |